Fastener



FIG. 1 is a front left top perspective view of a fastener showing my new design;

FIG. 2 is a rear right bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a cross-sectional view thereof, taken along a line 9—9 of FIG. 4;

FIG. 10 is a cross-sectional view thereof, taken along a line 10—10 of FIG. 3;

FIG. 11 is a cross-sectional view thereof, taken along a line 11—11 of FIG. 3;

FIG. 12 is a front elevational view thereof in the open position;

FIG. 13 is a top plan view thereof in the open position; and,

FIG. 14 is a cross-sectional view thereof, taken along a line 14—14 of FIG. 13. 

The ornamental design for a fastener, as shown and described. 